1 /*

     2  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package jdk.internal.net.http.frame;

    27 

    28 import java.nio.ByteBuffer;

    29 import java.util.List;

    30 

    31 public class PushPromiseFrame extends HeaderFrame {

    32 

    33     private int padLength;

    34     private final int promisedStream;

    35 

    36     public static final int TYPE = 0x5;

    37 

    38     // Flags

    39     public static final int END_HEADERS = 0x4;

    40     public static final int PADDED = 0x8;

    41 

    42     public PushPromiseFrame(int streamid, int flags, int promisedStream, List<ByteBuffer> buffers, int padLength) {

    43         super(streamid, flags, buffers);

    44         this.promisedStream = promisedStream;

    45         if(padLength > 0 ) {

    46             setPadLength(padLength);

    47         }

    48     }

    49 

    50     @Override

    51     public int type() {

    52         return TYPE;

    53     }

    54 

    55     @Override

    56     int length() {

    57         return headerLength + ((flags & PADDED) != 0 ? 5 : 4);

    58     }

    59 

    60     @Override

    61     public String toString() {

    62         return super.toString() + " promisedStreamid: " + promisedStream

    63                 + " headerLength: " + headerLength;

    64     }

    65 

    66     @Override

    67     public String flagAsString(int flag) {

    68         switch (flag) {

    69             case PADDED:

    70                 return "PADDED";

    71             case END_HEADERS:

    72                 return "END_HEADERS";

    73         }

    74         return super.flagAsString(flag);

    75     }

    76 

    77     public void setPadLength(int padLength) {

    78         this.padLength = padLength;

    79         flags |= PADDED;

    80     }

    81 

    82     public int getPadLength() {

    83         return padLength;

    84     }

    85 

    86     public int getPromisedStream() {

    87         return promisedStream;

    88     }

    89 

    90     @Override

    91     public boolean endHeaders() {

    92         return getFlag(END_HEADERS);

    93     }

    94 

    95 }